1231103223123 has 16 divisors (see below), whose sum is σ = 1658403264672. Its totient is φ = 812276000000.

The previous prime is 1231103223113. The next prime is 1231103223199. The reversal of 1231103223123 is 3213223011321.

It is a cyclic number.

It is not a de Polignac number, because 1231103223123 - 2¹⁰ = 1231103222099 is a prime.

It is a super-3 number, since 3×1231103223123³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231103223093 and 1231103223102.

It is not an unprimeable number, because it can be changed into a prime (1231103223113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92628 + ... + 1571873.

It is an arithmetic number, because the mean of its divisors is an integer number (103650204042).

Almost surely, 2^{1231103223123} is an apocalyptic number.

1231103223123 is a deficient number, since it is larger than the sum of its proper divisors (427300041549).

1231103223123 is a wasteful number, since it uses less digits than its factorization.

1231103223123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1667046.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1231103223123 its reverse (3213223011321), we get a palindrome (4444326234444).

The spelling of 1231103223123 in words is "one trillion, two hundred thirty-one billion, one hundred three million, two hundred twenty-three thousand, one hundred twenty-three".